Bearing



Patented Mar. 24, 1931 UNiTED STATES PATENToFFlcz-z mi 'lamme I l mmApplication led December 24, 1926.v Serial No.'156,805.

This is an improvement upon the process and a paratus for making linedbearings dlsclosedp and claimed in the ap lica'tion of H. L. Barton,Ser. No. 75,078,

In that application a blankls cut of proper size for a bearing back andthe blank 1s then coined or ressed to reduce it to substantlallylinished slia le and size. In sc me cases an additional reaching actionl1s necessary alon the parting line as well as at the ends of the lank.The blank thus formed 1s then placed in a die and the proper amount ofpowdered bearing metal 1s poured withln 1t, whereupon it is subjected toa presslng action resulting in causing the particles of metal to adhereto the back forming a finv ished lined bearing.

' According to my invention the bearing back blank is pressed to thedesired curvature as in lthe Barton process. This `results 1n the upperedges of the blan k as summg an 1ncllned position with the high sldestoward the center of the bearing. The blank 1s vthen placed in asuitable die, softbearing metal referably in powdered form 1s placedwithm it, and the die plunger is driven home forcing the soft metal intointimate contact wlth the bearing back and at the same tunestraightening the edges of the blank. T h1s method possesses theadvantage that the hlgh sides of the blank serve as dams for thepowdered metal, retainingit in position durlng the initial spreadingoperation and when the vshoulders on the die plunger engage the highsides of the edges of the blank, a good seal is provided confining thebearing metal within the b ack `for theV remainder of the pressingoperation. 'At the same time the step of finishing the edge of the blankprior to lining it is dispensed with.

In the drawings:

Fig. 1 is a plan view of the blank;

Fig. 2 illustrates diagrammatically the 4blank undergoing'the initialshaping operation. l

- Fig. 3 is a similar view showing the lining operation at the beginningof'l the veffective 50 portion ofthe stroke of the plunger;

ed December Fig. 4 is a view similar to Fig.-3 showing the die plungerin its lowermost position.

Figs. 5 and 6 are enlarged details showing the elect produced on theedges of the blank4 by the shoulders on the die plunger and the vmannerin which the edges serve to retain the bearing metal in place.

Reference character2 indicates .a blankof sheet metal from which thebearing back is formed. I have found steel or brass to be suitablemetals for this purpose. Fig. 2 shows the blank 2 forced 4into die 4 byplunger 6. By this or similar means the lank is given the desiredcurvature.

Figure 3 shows the blank`2 in a second die 65 sides l2 risinghigher thanthe outer sides 14. 75

This result follows'from the bending operation. Referring now to Figure5 it will be y noted that when the shoulder 16 on the plunger 8 engagesthe high side 12 of the edge of the blank, a seal is formed whichprev'ens/MLWv l the bearing metal indicated at 10 fro spreading over theedges of the blank. Subsequent downward movement of the plunger 8 willcrowd the metal of the blankfromvv the high point 12 toward the lowpoint 14 85 straightening the-edge of the blank. At the same time thebearing kmetal is forced into intimate contact with the metal of theback and is caused to adhere thereto. v s

By the described process. not only is the separate step ofstraighteningthe edges of the blank dispensed with, but the high sides v of the edgesare made use vof to retain the.` bearing metalin desired position.

I claim: l

1. The method of making a lined bearing which consists yin roviding asuitable blank, bending the blank to the desired curvature for a bearingback, and thereb cause the inner sides of the edges ofthe b ank toassume a positibn hi her than the outer sides thereof, placing the ackin a suitable die, applyin soft metal to the interior of the blank ansubjecting the bearing to a pressing operation to cause the soft metalto adhere to the blank and to simultaneously straighten the edges of theblank.

2. The steps in the method of making a lined bearing,I comprising:bending a flat sheet blank into a curved bearing back and thereby causethe inner edges of the sides of the curved back to assume a positionhigher than the outer edges thereof, placing the curved back in a.suitable die cavity and applying soft metal loosely upon the interior ofsaid curved back, and then forcing a die plunger into lsaid die cavityto form the soft metal into a bearing lining adhering to said back andto cause-said plunger to engage said inner edges of said back to form asubstantial seal to prevent said soft metal from flowing beyond the edgeof said back.

3. The steps in the method of making a lined bearing, comprising:providin a curved bearin back aving the inner e ges of its sides hig erthan the outer edges thereof, placing the curved back in a suitable diecavlty and applying soft metal loosely u un the interior of said curvedback, and `t en forcing a die plunver into said die cavity to form thesoft metal into abearing lin-ing adhering to said back and to cause saidplunger form a substantialseal to prevent said soft to engage said inneredges of said back to metal from flowing beyond the edge of said back.

In testimony whereof I aix`m signature.

LLOYD BLAC ORE.

